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Related Concept Videos

Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...

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Diameter measurement of single-mode fiber by using interferometric and imaging techniques.

C Joenathan, R M Bunch

    Applied Optics
    |September 22, 2010
    PubMed
    Summary

    Accurate single-mode fiber cladding diameter measurement is achieved using two novel methods. One utilizes interference fringe spacing, while the other employs lens-based imaging for precise fiber characterization.

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    Area of Science:

    • Optics and Photonics
    • Fiber Optics Technology
    • Metrology

    Background:

    • Accurate measurement of optical fiber dimensions is critical for telecommunications and sensing applications.
    • Existing methods for cladding diameter measurement may lack precision or require specialized equipment.
    • Single-mode fibers require precise characterization for optimal performance.

    Purpose of the Study:

    • To present two novel, accurate, and accessible methods for measuring the cladding diameter of single-mode fibers.
    • To theoretically analyze the fringe formation in an interferometric setup for fiber metrology.
    • To demonstrate the potential for high-accuracy measurements with minimal error.

    Main Methods:

    • Interference fringe measurement: Analyzing fringe spacing at two planes using an interferometeric arrangement.
    • Lens-based imaging: Utilizing a lens to image point sources and their magnification for diameter estimation.
    • Theoretical analysis: Investigating Gaussian field distribution effects on fringe patterns and Lloyd mirror arrangements.

    Main Results:

    • Consistent fiber cladding diameter measurements were obtained using both proposed methods.
    • The interference method theoretically accounts for Gaussian field distribution effects on fringe maxima and minima.
    • The lens-based method demonstrated enhanced accuracy with multiple point sources.
    • Standard error for cladding diameter measurements was less than 0.15 µm.

    Conclusions:

    • The presented interference fringe and lens-based imaging techniques offer reliable and accurate methods for single-mode fiber cladding diameter measurement.
    • These methods provide a practical approach for fiber characterization with high precision.
    • The findings contribute to advancements in optical fiber metrology and quality control.